Cisco ISR4331-SEC/K9 Integrated Services Router

The Cisco ISR4331-AXV/K9 Integrated Services Router is a 1U, rack-mountable enterprise router for branch offices and remote WAN sites, delivering secure data routing and voice capabilities on a single platform; alternate part number ISR4331-SEC/K9. It provides hardware-based VPN encryption, up to 100 Mbps base throughput (license-upgradable), 3x Gigabit Ethernet RJ-45 interfaces, 2 Network Interface Module slots, 1 Service Module slot, and internal AC power for rack deployment. Voice support is available for PVDM4 DSP modules (PVDM4-32 not included), and it runs Cisco IOS XE with CLI and SNMP management. Common replacements include ISR4351/K9, ISR4321/K9, and ISR4431/K9, making it suitable for securing WAN connectivity, VPN, and unified communications in enterprise networks.